Ericsson 1341 NAM & Options programming
This has also been known to work on the ET-237. First download the software
from http://www.geocities.com/SiliconValley/Heights/2675.
The 1341 serial interface operates at TTL (not RS-232) levels, so you must
use a MAX203 converter. The pins are numbered from left to right with the
phone face up. Using the MAX203 converter and a DB-25 for the computer's
serial port:
Computer
DB25 Phone
2----------MAX-203------------11
3----------MAX-203------------12
7-------------GND--------------8
|
8---
5---
|
6---